3.1.1

• Fixed current: false
• Fixed last with group_by_quarter
• Raise ArgumentError when last option is not supported

3.1.0

• Better support for date columns with time_zone: false
• Better date range handling for range option

3.0.2

• Fixed group_by_period with associations
• Fixed week_start option for enumerables

3.0.1

• Added support for Redshift
• Fix for infinite loop in certain cases for Rails 5

3.0.0

Breaking changes

• Date objects are now returned for day, week, month, quarter, and year by default. Use dates: false for the previous behavior, or change this globally with Groupdate.dates = false.
• Array and hash methods no longer return the entire series by default. Use series: true for the previous behavior.
• The series: false option now returns the correct types and order, and plays nicely with other options.

2.5.3

• All tests green with mysql gem
• Added support for decimal day start

2.5.2

• Added dates option to return dates for day, week, month, quarter, and year

2.5.1

• Added group_by_quarter
• Added default_value option
• Accept symbol for format option
• Raise ArgumentError if no field specified
• Added support for ActiveRecord 5 beta

2.5.0

• Added group_by_period method
• Added current option
• Raise ArgumentError if no block given to enumerable

2.4.0

• Added localization
• Added carry_forward option
• Added series: false option for arrays and hashes
• Fixed issue w/ Brasilia Summer Time
• Fixed issues w/ ActiveRecord 4.2

2.3.0

• Raise error when ActiveRecord::Base.default_timezone is not :utc
• Added day_of_month
• Added month_of_year
• Do not quote column name

2.2.1

• Fixed ActiveRecord 3 associations

2.2.0

• Added support for arrays and hashes

2.1.1

• Fixed format option with multiple groups
• Better error message if time zone support is missing for MySQL

2.1.0

• Added last option
• Added format option

2.0.4

• Added multiple groups
• Added order
• Subsequent methods no longer modify relation

2.0.3

• Implemented respond_to?

2.0.2

• where, joins, and includes no longer need to be before the group_by method

2.0.1

• Use time zone instead of UTC for results

2.0.0

• Returns entire series by default
• Added day_start option
• Better interface

1.0.5

• Added global time_zone option

1.0.4

• Added global week_start option
• Fixed bug with NULL values and series

1.0.3

• Fixed deprecation warning when used with will_paginate
• Fixed bug with DateTime series

1.0.2

• Added :start option for custom week start for group_by_week

1.0.1

• Fixed series for Rails

1.0.0

• First major release